5Andreu J, Cdceres J, Pallisa E, et al. Radiological manifestations of pulmonary tuberculosis. European Journal of Radiology, 2004,5 ( 1 ) :139-149.
6Leung P, Isabel T, Mercedes P. The Halo Sign in Computed Tomography Images: Differential Diagnosis and Correlation With Pathology Findings. Arch Bronconeumol, 2008, 44(2): 386-392.